The Jungletac ROMS came with my first Dingoo, which I got back in December of 2009. The unit played them perfectly. This is not true, though, of all Dingoos. Of the six A320s I've had, three have supported the Jungletac ROMs and three have not. I've tried various versions of the GBA emulator, but the results are the same. It appears to be a result of the manufacturing change -- Dingoos with one chip support the Jungltac ROMs; Dingoos with two chips do not.
It's the same scenario as the NEO GEO sprite scaling problem. The pixellation issue does not occur on one-chip Dingoos, but it does occur on two-chip Dingoos. I'm assuming that, since the Jungletac problem is present on the A330, the NEO GEO problem will be, too... which makes me very sad.
The Jungletac thing doesn't bother me all that much (except for not being able to play "Rolling Block" anymore
), but the NEO GEO problem does. A lot. You'd think that when a company changes their hardware they'd be responsible enough to upgrade their own software so it still runs correctly on the new hardware. The NEO GEO isn't a third-party community product; they should have fixed it when it started failing on A320s. The same is true of the GBA emulator, which has other issues aside from the Jungletac thing.
I haven't received my A330 yet so I can't say for certain if the NEO GEO problem is still there, but I'm not feeling very optimistic right now. On my A320s, I've switched to using FBA320 on Dingux for playing NEO GEO games, as it doesn't have any sprite scaling problems. It'd be nice to have a native OS solution, though. Of course, it'd also be nice to play Rolling Block again.